GRAND RAPIDS, MI — A suspect remains on the run Monday morning after robbing a 7-Eleven convenience store overnight.

Police responded to the store in 1300 block of Alpine Avenue NW on reports a clerk was held at knife-point, Grand Rapids Police Lt. John Bylsma said. The suspect, believed to be a middle-aged man, ran from the scene before police arrived.

A K-9 unit was called to track the suspect but was unsuccessful. Police say they are unsure what was taken from the store.

The incident was reported around 3:30 a.m., Bylsma said.

Andrew Krietz covers breaking and general police/fire news for MLive | The Grand Rapids Press. Email him at akrietz@mlive.com or follow him on Twitter.